I've taken shrooms a couple times recently (2g doses) with incredibly minimal effects. I know the shrooms are potent, two friends started tripping at half that dose. I know lamictal blocks dissociative states does that mean it blocks the ability to trip too?
Yep there's your issue. It outcompetes shrooms and acid for seratonin action, kinda like how Naltrexone outcompetes opiates and alcohol for opiate action. Seratonin syndrome isn't really an issue with normal psychedelics like shrooms and acid, but I would avoid MDMA, Ayahuasca and DXM like the fucking plague